/Engine/Source/Runtime/SignalProcessing/Public/DSP/Granulator.h
Sets the envelope type to use for new grains. Will instantly switch all grains to this envelope type so may cause discontinuities if switched while playing.
void SetGrainEnvelopeType ( const [EGrainEnvelopeType](API\Runtime\SignalProcessing\DSP\Audio__EGrainEnvelopeType) InGrainEnvelopeType )